Valve



July 13 1926.- 1,592,748

E. R .SLAGLE VALVE Filed- Dec. 22, 1925 f w@ m l d I il ATTORNEYS.

. tion I have shown in the accompanying July 13, 1926,."

EvERE'r'r n. steam, or seran. PENNSYLVANIA, essmNoa, BY iaEsNE ASSIGN- MENTS, To STANDARD VACUUM BRAKE co., or CAMDEN, NEW JERSEY, a CORPORA- TION JERSEY.

VALVE,

Applicatianl led December 22, 1925. Serial No. 77,000.

This invention relates to an improvement in valves.

The object of my invention is to provide an improved three-way valve mechanism, in which two valves are employed, one of which is closed before the other is opened. This insures proper communication of the variousports of the' valve with each lother, in order to. transfer the uid properly through these various ports.

In this valve construction, a valve-chamber is u provided within the casing, into which chamber a plurality of ports open. A valve is arranged to close one of these ports, but is provided with a ,central open- 1n .and a plurality of radial openings in or er to leave another of the ports open or in communication with the third. Within this first-mentioned valve, a second valve is arranged in order to cut oti" this lastr'nentioned communication. The operating mechanism having the two valvesis so arranged that one of the valves is closed or seated on its seat before the other is opened.

For thepurpose of illustrating my invenl drawings a form thereof which is at present preferred byme, since the same hasbeen found in practice to give satisfactory and ,reliable results,' although it isto be understood that the various instrumentalities ofl which myinvention consists can bevariously arranged and organized and thatpmy 1 invention is not limited to the precise arrangementA and organization of the instru- -mentalities as herein shownand described.

In. theY accompanying drawings l 1 is a vertical sectional view through my improved valve mechanism, showing the main valve seated, and' the release valve unv seated; andV Y Fig. 2 is a similar view with the valves lin their' opposite extreme ositions.

The valve is formed Ao a casinghaving upper and lower ysections 1 and 2, respectively. The lower section terminates in extended nipples 3 and' 4, through which 1 openings 5 and 6 respectively extend. 1 The opening 5 terminates at its inner end in an 'annular recess 7 formed in the face of the section 2 of the valve-casing. The section 1 is made substantially hollow, providing a-n internal valve-chamber 8 for receiving the valve mechanism hereinafter described.

The sect-ion 1 of the casing terminates in an upward extension 9 provided with a central opening 10extending therethrou'gli and chamber 18 for the release valve 19. The

release valve 19 has a valve-stem 2O secured thereto, whichstein extends through the sleeve 11. The outer'end of the valve-stem 20 has a nut 21 and washer 2v2 secured thereon, against which the spring 23 abuts. The opposite end of the spring 23 is received in a'seat 24-in the cap 25, normally resting upon the outer end of the upward eXtension 9. A yoke 26 is connected with the cap 25 by means of the screws 27. The yoke 26 may be connected with any suitable mechanism for actuating the valves, preferably a foot pedal in proximity to a. conventional or standard brake pedal of an automobile. The port 28 leads to the atmosphere.V The ports 29 are controlledxby the release valve 19, and communicate with the chamber 18 within the main valve 12, and similar openings or ports 30 are provided through theV plate 14 and valve-disk 16, which. closes the lower end of this chamber 18. These openin ys 30,*of which a plurality may be provi ed around the valve, are in alignment with' the annular recess 7. The opening 6 is nal combustion engine, while the opening or passage 5 may if'desired be connected to 'suitable brake chambers.

` desired extent.

The pperation of the valve is .as zfoll-` lows f j The yoke 26 is moved in an upward direction causing the release valve 19 to close theY ports 29.A Any further movement ofthe yoke would cause the main valve 12 to'lift from its seat permitting the air tobe withdrawn from the opening 5 through the chamber 8 into the opening 6 and thus into the tank or the intake manifold.

Then sufficient air has been removed from the vacuum actuated device to create' a partial vacuum therein, the vacuum on the lower end of the main valve l2, overcomes the ten sien of the spring 23, causing the main valve 12 to pull down against its seat, thereby shutting otf'the opening G. The tension'of the spring determines the point at which the main valve closes. vTo release the vacnum in th-e vacuum actuated device, the yoke 26 is moved downwardly thus reducing the tension on the spring 23. It can readily be seen that the vacuumon the underside of -thc release valve 19 would cause it to open sidiiciently to allow a small quantity of air to enter from the atmosphere until the spring tension is again. balanced through the port 2S, and through the opening in the mam valve 30 into the opening 5 thereby reduc ing the vacuum in the vacuum actuated device. Still further downward movement would cause the valve 19 to release still more and when the yoke 25 is in its normal position, the release valve would-be entirely open as seen in Fig. l permitting atmospheric pressure to enter the opening 5*.

The advantages of a valve of this character are as follows 'When used in connection with the proper brake chambers for applying the brakes of an automobile or motor bus, it is possible to make a gradual or instantaneous stop at the will of the driver by the actuation of the yoke to the Vhen a proper amount of air has been withdrawn from the brake chambers, the valve automatically shuts off regardless of the vacuum in the tank or the intake manifold of an internal combustion engine.

It. also provides an instantaneous release which is necessary for the operation of these vehicles. y

The cup washer 13 prevents leaking of the atmosphere through the port 28 into the openings 5 and 6 when the release .valve 19 is closed as seen in Fig. 2. The springs 3l are for maintaining a` normally closed position ot' the main valve when there is no vacuum in the ,openings 5 and 6.

It will thus be noted that this invention provides a simple, eiicient. 'and inexpensive.

valve mechanism fr establishing communi#A` cation between any 'of a plurality of ports,

- or for cutting ofi' any of these ports lfrom' each other. `Provision is also made in the thereof which have been found in, practice to give satisfactory and reliable results it is to be understood that the same are suscep tible of modification in various particulars.

without departing from the spirit or-Soope 4 of the invention or sacrificing any of" its advantages.

Iclaim: v l. In a device of the character stated, a valve casing having a portropen to the ate mosphere, a main valve in said casing and provided with upper and lower ports, a release valve located. within 'said main valve and adapted to control the uppervports of said main valve, a plurality ofV passages in the lower portion of said valve casingand means for enabling the lower portsof said 'main valve to communicate at all times 'with one of said passages.

2. In a device of the character stated. a, valve casing having a port in its upper portion open to the atmosphere, a main valve' in said casing and provided with upper and lower ports, a release valve located within said main valve, and adapted to 4control the upper ports of said main valve, a plurality of passages in the lower portion of saidA valve casing, means for enabllng the lower ports of said main valves; to communicate' at lall times with one of said passages and springs interposed between the top wall of said valve casing and the top of said main valve for forcing the latter downwardlyupon its seat.

3. In a device of 'thegeharacter stated, a valve casing having a `port Atherein and a' cap mounted on the top thereof, a yoke connected to said cap, a mainvalve in said casing Aand -provided with upper and lower ports, a release valve contained within said main valve and adapted to cont-rol the upper ports thereof, a valve stem for said release valve, an'abutinent on the upper end of said valve stem and aspring interposed between said cap and said abutment;

4. In a device of the character stated, a

valve casing having a port open to theat-l mosphere and a cap mounted on the top i .upper end,of.said valve'stem, a spring interposedbetween said cap and said abutment, a plurality of passages leading from,

the lower. portion, ofi' valve;` and means for forming a communication at al1 times 4between the lower portsy of Said'main valve and one of saidpassages.

4 5.' A valve mechanism including a valvecasing having a valve compartment therein,

central and lateral openings communicating therein, saidcasing having a valve-chamber lwithsaid'valve compartment, a valve normally covering one of said openings and adapted to `he held in 'said position by means of iz-suction applied thereto through said covered opening, means for causing said valve com artment to `communicate with the atmosp ere,an d means forfcausing communcation of said-lateral opening with the 6. valve mechanismv including a casing having a valve-chamber therein, and a portv open to the atmosphere central and lateral openings communicating with said chamber, a mainl valve received 'in said chamber, and having a release valve'slidable` therein, said main valve havingopenings therethrough in -position to be closed b v said release valve.

7. A valve mechanism including a vvalve casing having central and vlateral openings therein with which said openings communicate, a main valve slidable in said valvechamber in osition to close one of said openings, sai main valve having an opening therein, a release valve for closing said opening, and meansfor moving saidielease valve to its seated; position for closing the opening before the main valveis u nseated.

8. A valve mechanism including a valvecasing having a valve-chamber therein, and having openings communicating with said valve-chamber, armain valve mounted in the valve-chamber, and having a sleeve thereon, said main valve being hollow, a

release valve slidably mounted therein, a valve-stem connected with said. release valve andsl'idable through said sleeve, said main valve having a plurality of openings therein in position ,to be closed byysaid release valve, a ca connected with the outer end of said va ve-stem, and a-'yoke connected to said cap for seating or unseating the valves. p

9, A valve mechanism including a casing having a valve-chamber therein, a plurality of openings communicating with one side' of said valve-chamber, a mainrvalve" slidablyreceived in said valve-chamber, a` disk carried by said main valvefor'closing one of the openings, means for normally holdingA said valve-disk on its seat, an upward extension for said-casing having an opening sion, said main valve having a plurality of;

therethrough, a sleeve connected with' the main valve,and extending into said extenopenings therethrough, a release valve 'slidably received in said main valve in position vto close the openings therethrough, a valvesten-i connected with 'said `release valve and extending through said sleeve, ai .Cap mountl ed adjacent `said outer end of 'A the extension, a spring interposedbetween the outer end of said valve-stem andthe cap, tension devices intermediate. said cap and stemand a' yoke connected to said cap.

1(7). In a device of the character stated, a valve casing having .avalve'chamber therein, and .an open port leading to the atmosphere, a main valve in said casing' and provided with upper and lower ports, a plurality of openings inthe lower portion of said casing, one of saijdopenings being centrally disposed and' the other eccentricallyv dis-' posed to the axis of said casing, there being an annular groove in proximity to'the main valveseat communicating at all times with Aone of said openings, the lower ports in said main valve also `communicating with said annular groove, a release valve movable ing,

said main valve and adapted tocontrol the upper ports in said main valve, and springs intermediate said casing and the top of said main valve fory forcing the latter' towards its seat.

11. In a device of the character stated, a-

valve Acasinghaving a plurality of openings in the lower portion and side thereof, a

hollow main valve in said casing for controlling one of said lower openings,A said main valve having ports in "the upper and lower walls thereof, an upward extension on said valve casing, a'sleeve extending upwardly from saidmain valve and guided ico in said extension, a release valve contained upper ports therein, a valve steml for said .within said main valve and controlling'ithe releasevalve slidable in said sleeve, an abutment on the upper end of said stem, a capmounted on the top of said extension, and

a spring interposed between said abutmentv and cap.

12. In a spring interposed yb'etweeirsaid abutmentl and cap, and tension devices interposed between the top of saidcasing and the top oi device of the-character stated, a I' valve casingl having a plurality of openings in the lower portion and side"tliereof,

said main valve for forcing the latter downwardly'upon its seat.

In` testimony EVERETT R. SLAGLE.

whereof Iairix mysgnature. j l

imV 

